"unrecoverable disk error" is not a Word error message. It is a Windows error message, informing you of an error reading/writing to a disk--be it a flash drive, a floppy disk, a hard drive, or an SSD.

My point is that you shouldn't be blaming Word; drive failures are right up there with death and taxes.

There are various services that will try to recover data from a corrupt drive--you might look into one of thise.